syscall_exec32: 32bit pieces for core dump (incomplete)

Just to get us up and running

diff --git a/Kernel/syscall_exec32.c b/Kernel/syscall_exec32.c
index c6f99ae..4de2328 100644 (file)
--- a/Kernel/syscall_exec32.c
+++ b/Kernel/syscall_exec32.c
@@ -376,3 +376,70 @@ char **wargs(char *ptr, struct s_argblk *argbuf, int *cnt) // ptr is in userspac
        return ((char **) argbase);
 }
 
+
+
+/* TODO */
+
+#ifdef CONFIG_LEVEL_2
+
+/*
+ *     Core dump
+ */
+
+static struct coredump corehdr = {
+       0xDEAD,
+       0xC0DE,
+       16,
+};
+
+uint8_t write_core_image(void)
+{
+       inoptr parent = NULLINODE;
+       inoptr ino;
+
+       udata.u_error = 0;
+
+       /* FIXME: need to think more about the case sp is lala */
+       if (uput("core", (uint8_t *)udata.u_syscall_sp - 5, 5))
+               return 0;
+
+       ino = n_open((char *)udata.u_syscall_sp - 5, &parent);
+       if (ino) {
+               i_deref(parent);
+               return 0;
+       }
+       if (parent) {
+               i_lock(parent);
+               if ((ino = newfile(parent, "core")) != NULL) {
+                       ino->c_node.i_mode = F_REG | 0400;
+                       setftime(ino, A_TIME | M_TIME | C_TIME);
+                       wr_inode(ino);
+                       f_trunc(ino);
+
+                       /* FIXME: need to add some arch specific header bits, and
+                          also pull stuff like the true sp and registers out of
+                          the return stack properly */
+
+                       corehdr.ch_base = MAPBASE;
+                       corehdr.ch_break = udata.u_break;
+                       corehdr.ch_sp = udata.u_syscall_sp;
+                       corehdr.ch_top = PROGTOP;
+                       udata.u_offset = 0;
+                       udata.u_base = (uint8_t *)&corehdr;
+                       udata.u_sysio = true;
+                       udata.u_count = sizeof(corehdr);
+                       writei(ino, 0);
+                       udata.u_sysio = false;
+                       udata.u_base = MAPBASE;
+                       udata.u_count = udata.u_break - MAPBASE;
+                       writei(ino, 0);
+                       udata.u_base = udata.u_sp;
+                       udata.u_count = PROGTOP - (uint16_t)udata.u_sp;
+                       writei(ino, 0);
+                       i_unlock_deref(ino);
+                       return W_COREDUMP;
+               }
+       }
+       return 0;
+}
+#endif